<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <!-- <input type="text" v-model="message">-->
    <!-- v-model的手动实现-->
    <input type="text" :value="message" v-on:input="inputChange">
    <!-- 简写-->
    <input type="text" :value="message" @input="message = $event.target.value">
    <h2>{{message}}</h2>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data: {
            message: 'simplelu'
        },
        methods: {
            inputChange(event) {
                this.message = event.target.value;
            }
        }
    })
</script>
</body>
</html>